Engine Oil Pressure Indicator Always On

ENGINE OIL PRESSURE INDICATOR ALWAYS ON

DIAGNOSTIC FAULT INFORMATION

IMPORTANT: Always perform the Diagnostic System Check - Vehicle. Testing and Inspection

CIRCUIT/SYSTEM DESCRIPTION
The instrument panel cluster (IPC) illuminates the engine oil pressure (EOP) indicator when the engine control module (ECM) detects a low oil pressure condition from the EOP sensor. The ECM sends a GMLAN message to the body control module (BCM) indicating a low engine oil pressure. The BCM sends a GMLAN message to the IPC requesting the IPC to illuminate the engine oil pressure indicator.

CIRCUIT/SYSTEM TESTING
1. Start the engine.
- If the EOP indicator illuminates after the displays test, replace the IPC.
- If the EOP indicator does not illuminate after the IPC displays test, check for a poor connection at the harness connector of the IPC.

REPAIR INSTRUCTIONS

IMPORTANT: Always perform the Diagnostic Repair Verification. Verification Tests

- Engine Oil Pressure Sensor and/or Switch Replacement
- Control Module References for IPC replacement, setup and programming